J channels are used around windows and doors on inside corners and where the siding meets the soffit or roof at an angle.
Installing vinyl j channel around doors.
After installing the new door you will need new j channel trim around the door to finish the cut ends neatly.
Measure from the top edge of the garage doorframe to a spot 3 4 inch below the edge of the boxing.
Simply slide the siding panel into the folded j channel.
Install vinyl j mold around the edges of the garage doors and windows.
Consult with your siding manufacturer to learn whether other proprietary siding.
Cut the j mold to fit and use 2 inch roofing nails at the rate of one nail every 8 inches to attach the j mold.